package com.wf.classRoomTest;

/**
 * @author mpk
 * @since 2024/6/12 10:41:31
 */
public class Sy {
    public static void main(String[] args) {

        sy();
    }

    public static void sy(){

        synchronized ("A") {
            System.out.println("123");
        }
    }


}
